/Engine/Plugins/Animation/IKRig/Source/IKRigEditor/Public/RetargetEditor/IKRetargeterController.h
Call this when IK Rig chain is renamed. Retains existing mappings using the new name.
void HandleRetargetChainRenamed ( [UIKRigDefinition](API\Plugins\IKRig\Rig\UIKRigDefinition) * IKRig, [FName](API\Runtime\Core\UObject\FName) OldChainName, [FName](API\Runtime\Core\UObject\FName) NewChainName ) const